Alternate Retina js Parse error on wordpress

[drivebass]

I use the default js script with a Wordpress 3.3 website and it works perfect.

echo "<script>document.cookie='resolution='+Math.max(screen.width,screen.height)+'; path=/';</script>";

When i change the default js with the alternate one for retina support (copied from the adaptive-images website) inside the echo command:

echo "<script>document.cookie='resolution='+Math.max(screen.width,screen.height)+("devicePixelRatio" in window ? ","+devicePixelRatio : ",1")+'; path=/'; </script>";

it returns a parse error:
Parse error: syntax error, unexpected T_STRING, expecting ',' or ';'

I've noticed that for the script you posted on your reply for Issue #36 (closed) you use different syntax:

<script>document.cookie='resolution='+(Math.max(screen.width,screen.height)*("devicePixelRatio" in window ? devicePixelRatio : 1))+'; path=/';</script>

I tried this version too but still returns the same error.

[MattWilcox]

It's because there are a mix of ' and " in there. Just change all the " to ' in the JS and you'll be fine. It's because PHP thinks the " is the end of a PHP instruction, when it isn't.

[drivebass]

Never crossed my mind, so simple! It worked great! Many thanks Matt! Your solution for the adaptive images is awesome!

[MattWilcox]

Cheers :D